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Equity Dilution Calculator

Simulate the impact of your fundraise on founder equity

Understand how fundraising rounds dilute your ownership stake. This calculator shows how much equity you'll give up in exchange for investment, and what your remaining ownership will be worth at different exit valuations.

Your Data

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Formula used:

New Ownership = (Old Shares / (Old Shares + New Shares)) × 100

Result

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SaaS Benchmarks

< 15% dilutionFounder-friendly
15% - 20% dilutionStandard Seed
20% - 25% dilutionStandard Series A
> 25% dilutionHigh dilution

Optimization Tips

  • Seed rounds typically dilute 15-20% per round
  • Series A typically dilutes 20-25%
  • Keep founder ownership > 50% through Series A if possible
  • Option pool (10-15%) also dilutes founders before new investors
  • Higher valuation = less dilution for same investment amount
  • Model 3-4 rounds to see your ownership at exit

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Related Metrics

Pre-Money ValuationPost-Money ValuationOwnershipOption Pool

How to Use This Calculator

When you raise money, new shares are issued to investors. Your ownership percentage decreases proportionally. If you own 80% and give 20% to investors, you now own 80% of the remaining 80% = 64% after the next round at same terms.

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